61. Letter from Francis Crick to Warren Weaver Creator: Crick, Francis, 1916-2004 Date: 6 July 1964 Genre: Letters (correspondence)
62. Letter from Francis Crick to James D. Watson Creator: Crick, Francis, 1916-2004 Date: 13 April 1967 Genre: Letters (correspondence)
63. Letter from Linus Pauling to Francis Crick Creator: Pauling, Linus, 1901-1994 Date: 25 April 1967 Genre: Letters (correspondence)
64. Letter from James D. Watson to Francis Crick Creator: Watson, James D., 1928- Date: 24 March 1967 Genre: Letters (correspondence)
65. Letter from Paul Doty to Francis Crick Creator: Doty, Paul M., 1920-2011 Date: 16 March 1967 Genre: Letters (correspondence)
66. Letter from John T. Edsall to Francis Crick Creator: Edsall, John T. Date: 14 March 1967 Genre: Letters (correspondence)
67. Letter from Marshall W. Nirenberg to Francis Crick Creator: Nirenberg, Marshall W. Date: 7 May 1966 Genre: Letters (correspondence)
68. Letter from Francis Crick to Lawrence Bragg Creator: Crick, Francis, 1916-2004 Date: 23 February 1967 Genre: Letters (correspondence)
69. Letter from Francis Crick to Maurice Wilkins Creator: Crick, Francis, 1916-2004 Date: 19 January 1967 Genre: Letters (correspondence)
70. Letter from Nathan M. Pusey, Harvard University to Francis Crick Creator: Pusey, Nathan M.Harvard University Date: 9 December 1966 Genre: Letters (correspondence)